Manually edit the biodata info. Do not trust the OCR to read and fill the fields correctly, as warned about on the evisa application website. You can edit up until the time you submit. No mistakes are allowed for the biodata entry fields.
Just before the visa expires a well timed entry (along with qualifying insurance) will get you another year stamp, so, almost 2 years out of that visa. After that final entry you'll need to buy a reentry permit to keep the current permitted to stay stamp.